Don't worry about the Not Activated status. That is normal if you bundle Slider Revolution to a product like in the case for our themes. Updates are managed by us. For details about this, please see the link posted previously by Nico.
I'm not sure by what you exactly mean by "don't face problem in future?" but, if there will be bugs discovered, you can report it to us and will forward it to ThemePunch, Slider Revolution's creator.